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Finding the Fourth Proportional to 73,140.30, 109,710.45 and 68,766.30

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Solution

The fourth proportional to 73,140.30, 109,710.45 and 68,766.30 is: 103,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,140.30 : 109,710.45 = 68,766.30 : x
  2. Step 2: Convert to fraction form
    73,140.30/109,710.45 = 68,766.30/x
  3. Step 3: Cross multiply
    73,140.30x = 109,710.45 × 68,766.30
  4. Step 4: Simplify right side
    73,140.30x = 7,544,381,717.84
  5. Step 5: Solve for x
    x = 7,544,381,717.84/73,140.30
  6. Step 6: Final answer
    x = 103,149.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.